The best configuration for Citrix NetScaler in an active-passive data center for disaster recovery is by using the global server load balancing feature for all resources that need to be accessed in the event of a failover to the passive data center.
But a standard high availability would fit this scenario as well when the backend environment has the same setup as the active data center. This means that there are no servers active in the passive data center. The servers will become active only when the active data center stops working. The servers in the passive data center side will need to be started manually by the hypervisor environment.
To use the high availability feature on Citrix NetScaler instead of global server load balancing, we need to be sure that the servers are configured with the same configuration as in the active data center:
Hostname
IP address
DNS server
So basically, the virtual machines in the active data center should be...